Study supports link between epilepsy and psychosis

Summary:A study of nearly 10,000 Finnish families finds that people with epilepsy are at greater risk for suffering from psychosis, and suggests that the two disorders share common structural and genetic origins.

A group of European researchers examined nearly 10,000 families with children born in Helsinki, Finland between 1947 and 1990. They looked at the psychiatric and neurological histories of both the children and their parents.

Here are their report's main findings:

People with epilepsy had 5.5 times the usual risk of having a psychotic disorder, almost 8.5 times the risk of having schizophrenia (a type of psychotic disorder) and 6.3 times the risk of having bipolar disorder.

Individuals whose parents had epilepsy had twice the risk of developing psychosis, compared with individuals with two non-epileptic parents.

People whose parents had psychosis had 2.7 times the chance of having epilepsy, compared with individuals with two parents without psychosis.

"Our evidence that epilepsy and psychotic illness may cluster within some families indicates that these disorders may be more closely linked than previously thought," said the study's first author Dr. Mary Clarke in a press release, "We hope that this epidemiological evidence may contribute to the on-going efforts to disentangle the complex pathways that lead to these serious illnesses."

Clarke's report isn't the first to suggest this link, but the size of the of the study gives a new certainty to the connection.

What's interesting about this to me is that it supports the idea of mental illnesses as physical illnesses. No one blames a person's character when they have a seizure, but schizophrenia can have a more shameful connotation, as if it's a personal weakness. If researchers can better pinpoint the commonalities of the two not only will we gain better insight into the disorders individually, we'll have further evidence to fight stigma against mental illness.